High voltage cable terminating assembly

ABSTRACT

There is disclosed a factory assembled slip-on type of cable terminator in combination with electrical equipment comprising a cylindrical shell of insulating material, a dielectric media contained within the electric equipment and surrounding the insulating material of the cylindrical shell and a selfenergizing resilient contact spring member within the cylindrical shell for improving the mechanical and electrical connections for current transfer. In addition, the self-energizing resilient contact spring member, together with other elements of the assembly, permits easy insertion of the cable connector although preventing accidental cable pull-out or cable blow-out under fault current conditions.

United States Patent Heppner 1451 May 9,1972

[ HIGH VOLTAGE CABLE TERMINATING ASSEMBLY [72] Inventor; Donald R.l-leppner, Chicago, Ill.

[73] Assignees G & W Electric Specialty Company, Blue lsland,1ll.

[22] Filed: Sept. 3, 1970 [21] Appl. No.: 69,334

Related US. Application Data [63] Continuation-impart of Ser. No.887,820, Dec. 24,

1969, abandoned. I I

[52] US. Cl. ..l74/l8, 174/19, 174/73 R, 174/75 D, 339/256 S [51] int.Cl ..H02g 15/22, l-lOlb 17/30 [58] FieldofSearch ..174/12BH,18,19,31R,73 R, 174/75 R, 75 D, 78, 80; 339/255 RT, 256 R, 256

RT, 256 S [56] References Cited UNITED STATES PATENTS Edmonds ..l74/75 DX Lusk 3,439,110 4/1969 ...l74/73 R 3,445,580 5/1969 Lusk ....l74/l2 BH3,474,393 10/1969 Woods ..174/18 UX FOREIGN PATENTS OR APPLICATIONS105,795 11/1938 Australia ..339/256 RT 227,696 4/1960 Australia 510,1898/1920 France ..339/256 S 948,159 l/1964 Great Britain ..174/31 R1,145,629 3/1969 Great Britain 1 74/12 Bl-l Primary Examiner-Laramie E.Askin A!!orne v--Fitch, Even, Tabin & Luedeku l 57] ABSTRACT There isdisclosed a factory assembled slip-on type of cable terminator incombination with electrical equipment comprising a cylindrical shell ofinsulating material, a dielectric media contained within the electricequipment and surrounding the insulating material of the cylindricalshell and a self-energizing resilient contact spring member within thecylindrical shell for improving the mechanical and electricalconnections for current transfer. In addition, the self-energizingresilient contact spring member, together with other elements of theassembly, permits easy insertion of the cable connector althoughpreventing accidental cable pull-out or cable blow-out under faultcurrent conditions.

10 Claims, 9 Drawing Figures PATENTEBMAY 9|972 .562082 SHEEI 3 BF 3 HIGHVOLTAGE CABLE TERMINATING ASSEMBLY CROSS-REFERENCES TO RELATEDAPPLICATIONS Mechanical-Electrical Connection For Electrical EquipmentTerminations.

BACKGROUND OF THE INVENTION The invention relates to cable terminationsystems and has reference in particular to cable terminators forinsulated cables, that is, plastic, paper, rubber, varnished cambric,etc., wherein all the necessary components are factory assembled and sodesigned that the cable terminator can be installed on location at thesite without the need of special skills or special equipment.

Overhead electrical power distribution systems are aestheticallydispleasing and thus, they detract from the appearance of a residentialarea. In an attempt to improve the external appearance of distributionsystems, the electrical utility companies have installed direct burialcables with the termination sectionalizing equipment and the like beinglocated within metallic housings which are supported on concrete pads ator below ground levels. Completely underground power distributionsystems with concrete vaults are also used in built-up commercial areasand also in the more congested portions of cities and towns. Althoughthe underground system improves the appearance of the neighborhood andminimizes the problem of wind, ice, and lightning damage, the high costof an underground system in comparison to overhead systems hasdiscouraged the more widespread adoption of the underground distributionsystems.

When the electricpower cables above a certain voltage rating are to beterminated at transformers and at oil switches, fuse cut-outboxes andthe like, it becomes necessary to build up the cable insulation to adiameter sufficient to form a cone for controlling the electricalstresses prevailing between the cable conductor as one electrode and theground as the other electrode of zero potential. It is well known thatburied and semi-buried power distribution systems are difficult andcostly to install since the primary cable terminations at the equipmentsite require either a pouring of the potting compound in the field or amanual taping to construct-the stress cones.

SUMMARY OF THE INVENTION The general purpose of this invention is toprovide an electro-mechanical terminator which allows a power cable tobe installed at the location of electrical equipment, e.g., atransformer or a switch, without requiring access to the inside of theequipment itself. To attain this, the present invention contemplates aunique terminator in combination with electrical equipment comprising; acylindrical shell of insulating material having a metal end portionfixedly secured to the base end of the cylindrical shell and to theelectrical equipment, a dielectric media contained within the electricalequipment and surrounding the insulating material of the cylindricalshell, a clamping plate member secured to the base end portion of thecylindrical shell having a central opening for accommodating the end ofa power cable adapted to be inserted through the base end portion andwithin the cylindrical shell, a diaphragm having location and which isconfined between the base end portion and the clamping plate member soas to form a seal with the parts, the diaphragm having an opening inaxial alignment with the opening in the clamping plate member, a plasticfilm located between the diaphragm and the base end portion and which isconfined in the same manner as the diaphragm, the plastic film sealingthe opening in the diaphragm and thus, sealing the entrance end of theterminator device, a metalhood portion in fixed sealed relation with thetop end of the cylindrical shell and having a recess therein in axialalignment with both the opening in the diaphragm and the opening in theclamping plate member, and a contact spring arrangement located in therecess of thehood portion and adapted to have resilient contactand'telescoping relation with the terminal end of the power cablefollowing insertion of the same within the cylindrical shelhwhereby toimprove the mechanical and the electrical connection between the powercable and the said hood portion.

It is, therefore, an object of the present invention to provide anequipment cable entrance that allows the cable to be installed in thefield without gaining access to the unit inside the equipment, that canbe installed in a relatively easy manner and which will provide greaterflexibility and greater overall economy than is now possible with theconstructions presently available on the market.

Another object of the invention is to simplify and improve themechanical and also the electrical connections for better currenttransfer with respect to electrical equipment of the type utilizing highpower transmission cables.

A further object is to provide a cable terminator of the slipon typesimilar to that disclosed in the Lusk U.S. Pat. No. 3,322,883, grantedMay-3, 1967, but wherein the mechanical and electrical connections forcurrent transferare materially improved by a self-energizing female typeof resilient contact spring member and wherein the terminator is incombination with electrical equipment containing a dielectric media.

Another and more specific object of the invention resides in providing aslip-on type of cable connector as described which will incorporate aself-energizing resilient contact arrangement permitting easy insertionof the male connector with adequate contact force for good currenttransfer, but which will prevent accidental cable pull-out or cableblow-out under fault current conditions.

With these and various other objects in view, the invention may consistof certain novel features of construction and operation as will be morefully described and particularly pointed out in the specification,drawings and claims appended thereto.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an elevational view showinga power cable termination device which embodies the improvements of thepresent invention;

FIG. 2 is a sectional view of the cable receiving portion of theterminating device as shown in FIG. 1, the same illustrating certainstructural details comingwithin the invention;

FIG. 3 is an elevational view, parts being shown in section, of theprepared end of a power cable ready for insertion and for locationwithin the cable receiving end of the present terminator device;

FIG. 4 is a sectional view showing the prepared end of the power cableof FIG. 3 in inserted relation with the present terminator device;

FIG. 5 is an elevational view showing the resilient contact spring ascontemplated by the invention for obtaining a better mechanical andelectrical connection for improved current transfer;

FIG. 6 is a top plan view showing a modified form of the resilientcontact spring;

FIG. 7 is a sectional view of the hood portion of the present terminatordevice showing the recess within which the resilient contact spring islocated;

FIG. 8 is a perspective view with portions removed of a three-phaseterminator which embodies the improvements of the present invention; and

FIG. 9 is a top view of the terminator in combination with electricalequipment.

I DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawingswherein like reference characters designate like or corresponding partsthroughout the several views, there is shown in FIGS. 1 through 9 aterminator assembly for a plastic dielectric insulated cable. Theterminator assembly 100 comprises a terminator portion connected to anelectrical equipment housing 20. The terminator portion 10 connected tothe electrical equipment housing 20 enables the insulated power cable tobe installed at the electrical equipment location without needing accessto the unit inside. In the preferred embodiment, the terminator assembly100 is adapted for three-phase operation (FIGS. 8 and 9); however, itwill be recognized by one skilled in the art that single-phase operationmay also be employed without departing from the spirit and scope of theinvention.

Referring now to FIGS. 1 through 4, it can be seen that the terminatorassembly 100 comprises terminator portion 10 formed of any suitableinsulating material such as a ceramic and having the outwardlyprojecting skirts 11 and the cylindrical base portion 12. The metal endportion 13 is fixedly secured as by cementing at 14 to the cylindricalbase portion 12 and to a wall 21 of said electrical equipment housing20. Said metal base portion depends below to provide an interior spacefor the metal stress control shield indicated in its entirety by thenumeral 15. An elastomeric sponge element 16 is also located within thespace provided by metal base portion in surrounding relation with thestress control shield and the base portion additionally provides theoutlet portion 17 to which is secured the plug 18 (FIG. 2) or theplastic container 19 (FIG. 4). v

The electrical equipment housing 20 may comprise the housing for anyelectrical equipment such as a transformer or a switch. Contained withinthe housing 20 is a dielectric media 22. One such dielectric media 22may be transformer type oil. The dielectric media 22 completelysurrounds the ceramic terminator 10 and is required for the properoperation of the terminator assembly 100. It will be noted that thelength of the ceramic insulator portion 10 is relatively short whencompared with a terminator such as that shown in U.S. Pat. No.3,439,110, granted Apr. 15, 1969, to George Lusk and assigned to the G &W Electric Company. Because of this relatively short length, thedielectric media 22 is required to provide necessary insulation for theterminator assembly 100. In the preferred embodiment, the wall 21 of thehousing 20 is interposed between a resilient gasket 22 as shown in FIG.2, thereby securing the terminator portion 10 to the electricalequipment housing 20.

Again referring to FIGS. 1 and 2, it can be seen that the stress controlshield is formed of metal and the same is generally annular so as tohave surrounding relation with the solid dielectric insulation 23 of thecable. The metal shield is suitably supported by the legs 24 and saidshield provides a plurality of inwardly bent fingers 25 for goodpressure contact .with the power cable overshield. The shield may beformed of beryllium copper although other conductive and springy metalsmay be employed. The specially formed contour of the fingers 25facilitates insertion of the prepared end of the cable within theterminator portion 10 and also provides electrical grounding contactbetween the shield and the cable overshield when the cable has beenfully inserted.

The closure structure for the factory assembled cable terminator is bestshown in FIG. 2. The clamping ring 26 is suitably secured to the metalend portion 13 by securing screws, not shown, but which are similar tothe. securing screws shown in the Lusk U.S. Pat. No. 3,439,110, grantedApr. 15, 1969. An elastomeric diaphragm 27 and the plastic film 28 insuperposed relation are located between the base of the end portion 13and the clamping plate and the said elements are clamped in place. Thediaphragm 27 is formed with a central opening 30 for receiving theprepared end of the cable and said film closes said opening and retainsan insulating compound within the factory assembled terminator. Theopening 30 which may be punched or molded centrally of the diaphragm 27is smaller than the diameter of the cable portion to be eventuallyassociated therewith following insertion of the cable. Thus, when theparts have been completely assembled as in FIG. 4, the diaphragm has astrong sealing contact with the cable and the diaphragm opening is intension.

lator by the peened ring member 34 and the bore 33 gradually decreasesin size at the top end of the hood to form the threaded opening 35, FIG.7, which is normally closed by the plug 36. The bore 33 at the base endof the hood 32 is somewhat enlarged in diameter for receiving a contactspring arrangement indicated in its entirety by the numeral 37. Thespring arrangement is retained in place within the base end of the hoodby the metal retaining ring 38 which may be peened or otherwise fixedlysecured to the base end of the hood. The contact spring arrangement isadapted to receive the male connector 40 which as shown in FIG. 3 isapplied to the terminal end of the metal conductor 41 after saidterminal end is exposed by removal of the insulation 23. It can be seenthat the hood portion 32 is disposed within the electrical equipmenthousing 20. The hood portion 32 is electrically connected by anysuitable means (not shown) to the electrical equipment itself. Forexample, hood portion 32 could be connected to a switch contactcontained within the electrical equipment housing 20.

The self-energizing female type of contact spring arrangement indicatedby numeral 37 may take the form of a continuous spiral spring ofpredetermined diameter and length to fit within the enlarged cavity 33in the base end of the hood. The spiral convolutions of such acontinuous springelement will be in substantial contact when in insertedrelation within the hood. Also the continuous spring element may have aformation in plan of any multi-sided regular plane figure such as asquare, a pentagon or a hexagon. It may be more particularly stated thatthe contact spring element will be polygonal in shape with the pentagonshape of FIG. 6 being preferredsince best results in connector insertionhave been achieved by this shape. In the place of the continuous springelement, a

satisfactory modification may be formed of a plurality of shortercontinuous spring segments such as indicated by numeral 42 in FIG. 5.Each spring segment may consist of several convolutions of spring wireeach having a polygonal shape such as a pentagon and wherein the size ofthe spring segments and also that of the continuous spring arrangementis predetermined by the diameter of the male connector 40 to be insertedwithin the hood portion of the terminator device. A plurality of springsegments 42 can be located within the cavity in the hood portion and thesame will function as a good mechanical and electrical connecting meansin the same efficient manner as the continuous spring element 37.

Another modification of mechanical and electrical contact springarrangement is shown in FIG. 6. In this modification the arrangementconsists of a plurality of single convolutions such as 43 which aresubstantially plano and which preferably have the shape of a pentagon.The single convolutions are formed from a length of wire that has beenbent to leave a gap or a split opening 44 in one corner. The continuousspring arrangement and also the single convolution arrangement when inplace within the hood portion will allow easy insertion of the maleconnector 40 and will also materially improve the current transferbetween the metal conductor 41 of the cable and the hood portion 32 ofthe terminator device.

The present cable terminating assembly is preferably equipped withimproved cable entrance means such as shown in the Lusk U.S. Pat. No.3,445,580, granted May 20, 1969. The entrance plate ring 45, which isgenerally formed of metal, is suitably secured by screws, not shown, tothe clamping ring 26 and the two elements clamp the entrance plategasket 46 therebetween. An elastomeric boot 47 is associated with thisentrance end of the cable and the said boot has a special formation atits top end and also at its bottom. The top end of the boot is formed toprovide the circular flange 48 which seats in a cavity formed in theunder surface of the entrance plate ring 45. The lip 50 at the bottomend of the elastomeric boot is designed to have tight circular contactwith the cable. The elastomeric boot is enclosed by the metal cup 51.

The terminator assembly 100 as described is assembled at the factory so.that after the cable end has been prepared, the same can be insertedwithin the terminator assembly with a resulting good electrical andmechanical connection being achieved without needing access to theinside of the electrical equipment Before the plug 36 is threaded inplace the space within the terminator is filled with an insulatingcompound which will have a dielectric constant or specific inductivecapacitance approximately equal to that of the plastic materials used inthe manufacture of the cable insulation. This provides a dielectricallycompatible system of isotropic nature. The compound'should also possessa high tack value to both the cable insulation, the inside bore of theterminator and the stress control shield 15.It is also desirable thatthe compound have the ability to retain its flexibility at temperaturesas low as 20 Fahrenheit.

To prepare the end of the power cable requires that the cable jacket beremoved for a specified distance as determined by the voltage size ofthe specific terminator device and then the insulation 23 is removed fora distance to expose the copper or aluminum conductor 41. The maleconnector 40 is fitted on the exposed terminal end of the metalconductor and a tight fit between the conductor and the male connectoris desirable. The molded plastic plug 18 is now removed and the plastictube 19 is screwed in its place. The cable grip 52, metal cup 51, theelastomeric boot 47, the entrance plate ring 45,

gasket 46 and the grounding strap 53 are placed on the power cable insequence as shown in FIG. 3 and the power cable is ready for insertionwithin the terminator assembly. Using a constant force, the maleconnector 40 causes the puncture of the plastic film 28 and theconnector will thus enter by way of the opening 30 in the elastomericdiaphragm. As the cable enters the terminator an equal amount ofcompound will be displaced and discharged to the plastic tube 19. Thecompound under pressure and being tacky in nature will cling to thecable insulation surface, thus leaving no voids or trapped air bubbles.The cable is inserted until the male connector passes through thecontact spring arrangement 37 and into contact with the hood portion 32.The resiliency of the contact spring arrangement is such as to permit aneasy insertion of the male connector 40, it being understood that thesize of the opening of the spring arrangement and the diameter of themale con nector have been correlated to this end.

With the cable connector fully inserted within the terminator device,the grounding strap 53 is attached to the clamping ring 26 by the screw54 and then the entrance assembly and cable grip are slid in place andfastened to the terminator. The cable grip 52 is formed of spring wireand the said grip is held at the termination end 55 by being fastened tothe entrance plate ring 45. Layers of plastic tape can then be appliedover the cable grip and for some distance along the cable jacket. Withthe removal of the plastic tube 19 and replacing of the same with theplug 18, the termination of the power cable is complete.

The cable grip holds the inserted cable securely in place and meetsrequirements for accidental cable pull-out or blow-out under faultcurrent conditions.

Referring now to FIGS. 8 and 9, there is shown a terminator assembly 100adapted for three-phase operation. The terminator assembly 100 comprisesthree terminator portions disposed within the electrical equipmenthousing 20 in a manner identical with that described above with regardto the single phase operation shown in FIG. 1. The terminator portionsare again completely immersed in a dielectric media 22 and are adaptedto allow a power cable to be installed at the electrical equipmentlocation without needing access to the unit inside. Each of thetermination portions 10 may be identical to those terminator portions 10shown in FIGS. 1 through 7 and when a cable is inserted, the cable gripof the terminator will hold the cable securely in place.

Obviously, many modifications and variations of the present inventionare possible in the light of the above teachings. It is, therefore, tobe understood that within the scope of the appended claims, theinvention may be practiced otherwise than as specifically described.

What is claimed is:

l. A terminator assembly for use with a power cable having a preparedend exposing a portion of the solid dielectric insulation of the cableand the metal conductor at the terminal end thereof and having a maleconnector in fixed relation on said exposed metal conductor, saidassembly comprising a tubular shell of insulating material having ametal end portion fixedly secured to the base end of said tubular shell,a clamping plate member secured to said metal end portion and having acentral opening for accommodating the prepared end of the power cable,an elastomeric diaphragm having a central opening aligned with theopening in said clamping plate member, said diaphragm being clampedbetween said end portion and said clamping plate member, a plastic filmlocated between the diaphragm and said end portion for sealing theopening in the diaphragm, a metal hood portion in fixed sealed relationwith the top end of said tubular shell and having a recess therein inaxial alignment ,with both the sealed opening in the diaphragm and theopening in the clamping plate member, a contact spring arrangementlocated in said recess and comprising a plurality of convolutions ofresilient metal, a cable grip comprising a conductive wire sheath forsurrounding and gripping the insulation of the cable and attached to aconductive termination member having a central opening for passing thecable end therethrough, and an entrance plate member having a centralopening concentric with the other of said openings and adapted to clampsaid termination member between said entrance plate member and saidclamping plate member after the prepared end of the cable is insertedinto the terminator assembly, whereby the plastic film sealing theopening in the diaphragm is ruptured and said male connector engagessaid contact spring arrangement in telescoping relation therethrough,said diaphragm forming a seal about the cable at the entrance of saidterminator assembly, and said grip supporting said cable to maintain theconnector engagement.

2. A terminator assembly according to claim 1 further comprising astress control shield having a location within the metal end portion ofsaid assembly.

3. A terminator assembly according to claim 1 wherein said plurality ofconvolutions of resilient metal have a polygonal shape in plan.

4. A terminator assembly according to claim 3 wherein said polygonalshape is a pentagon.

5. An electrical equipment housing including a terminator assembly foruse with a power cable having a prepared end exposing a portion of thesolid dielectric insulation of the cable and the metal conductor at theterminal end thereof and having a male connector in fixed relation onsaid exposed metal conductor, said assembly comprising a tubular shellof insulating material having a portion thereof within said housing andhaving a metal end portion fixedly secured to the base end of saidtubular shell, a clamping plate member secured to said end portion andhaving a central opening for accommodating the prepared end of the powercable, an elastomeric diaphragm having a central opening aligned withthe opening in said clamping plate member, said diaphragm being clampedbetween said end portion and said clamping plate member, a plastic filmlocated adjacent said diaphragm for sealing the opening in thediaphragm, a metal hood portion in fixed sealed relation with the topend of said tubular shell portion within said housing and having arecess within said hood portion in axial alignment with both the sealedopening in the diaphragm and the opening in the clamping plate member, acontact spring arrangement located in said recess and comprising aplurality of convolutions of resilient metal, a cable grip comprising aconductive wire sheath for surrounding and gripping the insulation ofthe cable and attached to a conductive termination member having acentral opening for passing the cable end therethrough, and an entranceplate member having a central opening concentric with the other of saidopenings and adapted to clamp said termination member between saidentrance plate member and said clamping plate member after the preparedend of the cable is inserted into the terminator assembly, saidequipment housing further comprising means for maintaining saidterminator assembly in fixed sealed relation to said housing with thecentral opening of said diaphragm accessible from the exterior of saidhousing, and a dielectric medium contained within said housing andsurrounding the portion of said terminator assembly therewithin, wherebythe power cable may be installed at the location of the electricalequipment housing by insertion of the prepared end of the cable throughthe sealed opening in the diaphragm, causing the rupturing of theplastic film and the engagement of the male connector with said contactspring arrangement in telescoping relation therethrough, said diaphragmforming a seal about the cable at the entrance of said terminatorassembly, and said grip supporting said cable to maintain the connectorengagement.

6. An electrical equipment housing according to claim further comprisinga stress control shield having a location within said metal end portionof the terminator assembly.

7. An electrical equipment housing according to claim 6 wherein saidmetal end portion is located exteriorly of said housing.

8. An electrical equipment housing according to claim-5 wherein saidconvolutions of resilient metal of said terminator assembly have apolygonal shape in plan.

9. An electrical equipment housing according to claim 8 wherein saidpolygonal shape is a pentagon.

10. An electrical equipment housing according to claim 5 comprising aplurality of terminator assemblies like said terminator assembly firstmentioned, means for maintaining each terminator assembly in fixedsealed relation to said housing with the central openings of therespective diaphragms accessible from the exterior of said housing, andthe dielectric medium surrounding the portion of each terminatorassembly therewithin.

1. A terminator assembly for use with a power cable having a preparedend exposing a portion of the solid dielectric insulation of the cableand the metal conductor at the terminal end thereof and having a maleconnector in fixed relation on said exposed metal conductor, saidassembly comprising a tubular shell of insulating material having ametal end portion fixedly secured to the base end of said tubular shell,a clamping plate member secured to said metal end portion and having acentral opening for accommodating the prepared end of the power cable,an elastomeric diaphragm having a central opening aligned with theopening in said clamping plate member, said diaphragm being clampedbetween said end portion and said clamping plate member, a plastic filmlocated between the diaphragm and said end portion for sealing theopening in the diaphragm, a metal hood portion in fixed sealed relationwith the top end of said tubular shell and having a recess therein inaxial alignment with both the sealed opening in the diaphragm and theopening in the clamping plate member, a contact spring arrangementlocated in said recess and comprising a plurality of convolutions ofresilient metal, a cable grip comprising a conductive wire sheath forsurrounding and gripping the insulation of the cable and attached to aconductive termination member having a central opening for passing thecable end therethrough, and an entrance plate member having a centralopening concentric with the other of said openings and adapted to claMpsaid termination member between said entrance plate member and saidclamping plate member after the prepared end of the cable is insertedinto the terminator assembly, whereby the plastic film sealing theopening in the diaphragm is ruptured and said male connector engagessaid contact spring arrangement in telescoping relation therethrough,said diaphragm forming a seal about the cable at the entrance of saidterminator assembly, and said grip supporting said cable to maintain theconnector engagement.
 2. A terminator assembly according to claim 1further comprising a stress control shield having a location within themetal end portion of said assembly.
 3. A terminator assembly accordingto claim 1 wherein said plurality of convolutions of resilient metalhave a polygonal shape in plan.
 4. A terminator assembly according toclaim 3 wherein said polygonal shape is a pentagon.
 5. An electricalequipment housing including a terminator assembly for use with a powercable having a prepared end exposing a portion of the solid dielectricinsulation of the cable and the metal conductor at the terminal endthereof and having a male connector in fixed relation on said exposedmetal conductor, said assembly comprising a tubular shell of insulatingmaterial having a portion thereof within said housing and having a metalend portion fixedly secured to the base end of said tubular shell, aclamping plate member secured to said end portion and having a centralopening for accommodating the prepared end of the power cable, anelastomeric diaphragm having a central opening aligned with the openingin said clamping plate member, said diaphragm being clamped between saidend portion and said clamping plate member, a plastic film locatedadjacent said diaphragm for sealing the opening in the diaphragm, ametal hood portion in fixed sealed relation with the top end of saidtubular shell portion within said housing and having a recess withinsaid hood portion in axial alignment with both the sealed opening in thediaphragm and the opening in the clamping plate member, a contact springarrangement located in said recess and comprising a plurality ofconvolutions of resilient metal, a cable grip comprising a conductivewire sheath for surrounding and gripping the insulation of the cable andattached to a conductive termination member having a central opening forpassing the cable end therethrough, and an entrance plate member havinga central opening concentric with the other of said openings and adaptedto clamp said termination member between said entrance plate member andsaid clamping plate member after the prepared end of the cable isinserted into the terminator assembly, said equipment housing furthercomprising means for maintaining said terminator assembly in fixedsealed relation to said housing with the central opening of saiddiaphragm accessible from the exterior of said housing, and a dielectricmedium contained within said housing and surrounding the portion of saidterminator assembly therewithin, whereby the power cable may beinstalled at the location of the electrical equipment housing byinsertion of the prepared end of the cable through the sealed opening inthe diaphragm, causing the rupturing of the plastic film and theengagement of the male connector with said contact spring arrangement intelescoping relation therethrough, said diaphragm forming a seal aboutthe cable at the entrance of said terminator assembly, and said gripsupporting said cable to maintain the connector engagement.
 6. Anelectrical equipment housing according to claim 5 further comprising astress control shield having a location within said metal end portion ofthe terminator assembly.
 7. An electrical equipment housing according toclaim 6 wherein said metal end portion is located exteriorly of saidhousing.
 8. An electrical equipment housing according to claim 5 whereinsaid convolutions of resilient metal of said terminator assembly have apolygonal shape in plan.
 9. An eLectrical equipment housing according toclaim 8 wherein said polygonal shape is a pentagon.
 10. An electricalequipment housing according to claim 5 comprising a plurality ofterminator assemblies like said terminator assembly first mentioned,means for maintaining each terminator assembly in fixed sealed relationto said housing with the central openings of the respective diaphragmsaccessible from the exterior of said housing, and the dielectric mediumsurrounding the portion of each terminator assembly therewithin.